Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
d49d4317 | 2 | * Copyright (C) 2001-2004 by David Brownell |
53bd6a60 | 3 | * |
1da177e4 LT |
4 | * This program is free software; you can redistribute it and/or modify it |
5 | * under the terms of the GNU General Public License as published by the | |
6 | * Free Software Foundation; either version 2 of the License, or (at your | |
7 | * option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
11 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 | * for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software Foundation, | |
16 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
17 | */ | |
18 | ||
19 | /* this file is part of ehci-hcd.c */ | |
20 | ||
21 | /*-------------------------------------------------------------------------*/ | |
22 | ||
23 | /* | |
24 | * EHCI Root Hub ... the nonsharable stuff | |
25 | * | |
26 | * Registers don't need cpu_to_le32, that happens transparently | |
27 | */ | |
28 | ||
29 | /*-------------------------------------------------------------------------*/ | |
30 | ||
58a97ffe AS |
31 | #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) |
32 | ||
aff6d18f AS |
33 | #ifdef CONFIG_PM |
34 | ||
383975d7 AS |
35 | static int ehci_hub_control( |
36 | struct usb_hcd *hcd, | |
37 | u16 typeReq, | |
38 | u16 wValue, | |
39 | u16 wIndex, | |
40 | char *buf, | |
41 | u16 wLength | |
42 | ); | |
43 | ||
44 | /* After a power loss, ports that were owned by the companion must be | |
45 | * reset so that the companion can still own them. | |
46 | */ | |
47 | static void ehci_handover_companion_ports(struct ehci_hcd *ehci) | |
48 | { | |
49 | u32 __iomem *reg; | |
50 | u32 status; | |
51 | int port; | |
52 | __le32 buf; | |
53 | struct usb_hcd *hcd = ehci_to_hcd(ehci); | |
54 | ||
55 | if (!ehci->owned_ports) | |
56 | return; | |
57 | ||
58 | /* Give the connections some time to appear */ | |
59 | msleep(20); | |
60 | ||
61 | port = HCS_N_PORTS(ehci->hcs_params); | |
62 | while (port--) { | |
63 | if (test_bit(port, &ehci->owned_ports)) { | |
64 | reg = &ehci->regs->port_status[port]; | |
3c519b84 | 65 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
383975d7 AS |
66 | |
67 | /* Port already owned by companion? */ | |
68 | if (status & PORT_OWNER) | |
69 | clear_bit(port, &ehci->owned_ports); | |
3c519b84 AS |
70 | else if (test_bit(port, &ehci->companion_ports)) |
71 | ehci_writel(ehci, status & ~PORT_PE, reg); | |
383975d7 AS |
72 | else |
73 | ehci_hub_control(hcd, SetPortFeature, | |
74 | USB_PORT_FEAT_RESET, port + 1, | |
75 | NULL, 0); | |
76 | } | |
77 | } | |
78 | ||
79 | if (!ehci->owned_ports) | |
80 | return; | |
81 | msleep(90); /* Wait for resets to complete */ | |
82 | ||
83 | port = HCS_N_PORTS(ehci->hcs_params); | |
84 | while (port--) { | |
85 | if (test_bit(port, &ehci->owned_ports)) { | |
86 | ehci_hub_control(hcd, GetPortStatus, | |
87 | 0, port + 1, | |
88 | (char *) &buf, sizeof(buf)); | |
89 | ||
90 | /* The companion should now own the port, | |
91 | * but if something went wrong the port must not | |
92 | * remain enabled. | |
93 | */ | |
94 | reg = &ehci->regs->port_status[port]; | |
95 | status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; | |
96 | if (status & PORT_OWNER) | |
97 | ehci_writel(ehci, status | PORT_CSC, reg); | |
98 | else { | |
99 | ehci_dbg(ehci, "failed handover port %d: %x\n", | |
100 | port + 1, status); | |
101 | ehci_writel(ehci, status & ~PORT_PE, reg); | |
102 | } | |
103 | } | |
104 | } | |
105 | ||
106 | ehci->owned_ports = 0; | |
107 | } | |
108 | ||
0c0382e3 | 109 | static int ehci_bus_suspend (struct usb_hcd *hcd) |
1da177e4 LT |
110 | { |
111 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
112 | int port; | |
8c03356a | 113 | int mask; |
331ac6b2 | 114 | u32 __iomem *hostpc_reg = NULL; |
1da177e4 | 115 | |
8c774fe8 AS |
116 | ehci_dbg(ehci, "suspend root hub\n"); |
117 | ||
1da177e4 LT |
118 | if (time_before (jiffies, ehci->next_statechange)) |
119 | msleep(5); | |
f8fa7571 AS |
120 | del_timer_sync(&ehci->watchdog); |
121 | del_timer_sync(&ehci->iaa_watchdog); | |
1da177e4 LT |
122 | |
123 | port = HCS_N_PORTS (ehci->hcs_params); | |
124 | spin_lock_irq (&ehci->lock); | |
125 | ||
126 | /* stop schedules, clean any completed work */ | |
127 | if (HC_IS_RUNNING(hcd->state)) { | |
128 | ehci_quiesce (ehci); | |
129 | hcd->state = HC_STATE_QUIESCING; | |
130 | } | |
083522d7 | 131 | ehci->command = ehci_readl(ehci, &ehci->regs->command); |
7d12e780 | 132 | ehci_work(ehci); |
1da177e4 | 133 | |
8c03356a AS |
134 | /* Unlike other USB host controller types, EHCI doesn't have |
135 | * any notion of "global" or bus-wide suspend. The driver has | |
136 | * to manually suspend all the active unsuspended ports, and | |
137 | * then manually resume them in the bus_resume() routine. | |
138 | */ | |
139 | ehci->bus_suspended = 0; | |
383975d7 | 140 | ehci->owned_ports = 0; |
1da177e4 LT |
141 | while (port--) { |
142 | u32 __iomem *reg = &ehci->regs->port_status [port]; | |
083522d7 | 143 | u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |
1da177e4 LT |
144 | u32 t2 = t1; |
145 | ||
331ac6b2 AD |
146 | if (ehci->has_hostpc) |
147 | hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs | |
148 | + HOSTPC0 + 4 * (port & 0xff)); | |
8c03356a | 149 | /* keep track of which ports we suspend */ |
383975d7 AS |
150 | if (t1 & PORT_OWNER) |
151 | set_bit(port, &ehci->owned_ports); | |
152 | else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) { | |
1da177e4 | 153 | t2 |= PORT_SUSPEND; |
8c03356a AS |
154 | set_bit(port, &ehci->bus_suspended); |
155 | } | |
156 | ||
157 | /* enable remote wakeup on all ports */ | |
331ac6b2 AD |
158 | if (hcd->self.root_hub->do_remote_wakeup) { |
159 | /* only enable appropriate wake bits, otherwise the | |
160 | * hardware can not go phy low power mode. If a race | |
161 | * condition happens here(connection change during bits | |
162 | * set), the port change detection will finally fix it. | |
163 | */ | |
164 | if (t1 & PORT_CONNECT) { | |
165 | t2 |= PORT_WKOC_E | PORT_WKDISC_E; | |
166 | t2 &= ~PORT_WKCONN_E; | |
167 | } else { | |
168 | t2 |= PORT_WKOC_E | PORT_WKCONN_E; | |
169 | t2 &= ~PORT_WKDISC_E; | |
170 | } | |
171 | } else | |
58a97ffe | 172 | t2 &= ~PORT_WAKE_BITS; |
1da177e4 LT |
173 | |
174 | if (t1 != t2) { | |
175 | ehci_vdbg (ehci, "port %d, %08x -> %08x\n", | |
176 | port + 1, t1, t2); | |
083522d7 | 177 | ehci_writel(ehci, t2, reg); |
331ac6b2 AD |
178 | if (hostpc_reg) { |
179 | u32 t3; | |
180 | ||
181 | msleep(5);/* 5ms for HCD enter low pwr mode */ | |
182 | t3 = ehci_readl(ehci, hostpc_reg); | |
183 | ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg); | |
184 | t3 = ehci_readl(ehci, hostpc_reg); | |
185 | ehci_dbg(ehci, "Port%d phy low pwr mode %s\n", | |
186 | port, (t3 & HOSTPC_PHCD) ? | |
187 | "succeeded" : "failed"); | |
188 | } | |
1da177e4 LT |
189 | } |
190 | } | |
191 | ||
cd930c93 AS |
192 | /* Apparently some devices need a >= 1-uframe delay here */ |
193 | if (ehci->bus_suspended) | |
194 | udelay(150); | |
195 | ||
1da177e4 LT |
196 | /* turn off now-idle HC */ |
197 | ehci_halt (ehci); | |
198 | hcd->state = HC_STATE_SUSPENDED; | |
199 | ||
cdc647a9 DB |
200 | if (ehci->reclaim) |
201 | end_unlink_async(ehci); | |
202 | ||
8c03356a AS |
203 | /* allow remote wakeup */ |
204 | mask = INTR_MASK; | |
58a97ffe | 205 | if (!hcd->self.root_hub->do_remote_wakeup) |
8c03356a | 206 | mask &= ~STS_PCD; |
083522d7 BH |
207 | ehci_writel(ehci, mask, &ehci->regs->intr_enable); |
208 | ehci_readl(ehci, &ehci->regs->intr_enable); | |
8c03356a | 209 | |
1da177e4 LT |
210 | ehci->next_statechange = jiffies + msecs_to_jiffies(10); |
211 | spin_unlock_irq (&ehci->lock); | |
015798b2 JH |
212 | |
213 | /* ehci_work() may have re-enabled the watchdog timer, which we do not | |
214 | * want, and so we must delete any pending watchdog timer events. | |
215 | */ | |
216 | del_timer_sync(&ehci->watchdog); | |
1da177e4 LT |
217 | return 0; |
218 | } | |
219 | ||
220 | ||
221 | /* caller has locked the root hub, and should reset/reinit on error */ | |
0c0382e3 | 222 | static int ehci_bus_resume (struct usb_hcd *hcd) |
1da177e4 LT |
223 | { |
224 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
225 | u32 temp; | |
383975d7 | 226 | u32 power_okay; |
1da177e4 | 227 | int i; |
3a4e72cb | 228 | u8 resume_needed = 0; |
1da177e4 LT |
229 | |
230 | if (time_before (jiffies, ehci->next_statechange)) | |
231 | msleep(5); | |
232 | spin_lock_irq (&ehci->lock); | |
cfa59dab AS |
233 | if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) { |
234 | spin_unlock_irq(&ehci->lock); | |
235 | return -ESHUTDOWN; | |
236 | } | |
1da177e4 | 237 | |
ad45f1dc JW |
238 | if (unlikely(ehci->debug)) { |
239 | if (ehci->debug && !dbgp_reset_prep()) | |
240 | ehci->debug = NULL; | |
241 | else | |
242 | dbgp_external_startup(); | |
243 | } | |
244 | ||
f03c17fc DB |
245 | /* Ideally and we've got a real resume here, and no port's power |
246 | * was lost. (For PCI, that means Vaux was maintained.) But we | |
247 | * could instead be restoring a swsusp snapshot -- so that BIOS was | |
248 | * the last user of the controller, not reset/pm hardware keeping | |
249 | * state we gave to it. | |
250 | */ | |
383975d7 AS |
251 | power_okay = ehci_readl(ehci, &ehci->regs->intr_enable); |
252 | ehci_dbg(ehci, "resume root hub%s\n", | |
253 | power_okay ? "" : " after power loss"); | |
f03c17fc | 254 | |
8c03356a AS |
255 | /* at least some APM implementations will try to deliver |
256 | * IRQs right away, so delay them until we're ready. | |
257 | */ | |
083522d7 | 258 | ehci_writel(ehci, 0, &ehci->regs->intr_enable); |
8c03356a AS |
259 | |
260 | /* re-init operational registers */ | |
083522d7 BH |
261 | ehci_writel(ehci, 0, &ehci->regs->segment); |
262 | ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list); | |
263 | ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next); | |
1da177e4 LT |
264 | |
265 | /* restore CMD_RUN, framelist size, and irq threshold */ | |
083522d7 | 266 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
1da177e4 | 267 | |
e198a314 AS |
268 | /* Some controller/firmware combinations need a delay during which |
269 | * they set up the port statuses. See Bugzilla #8190. */ | |
3a4e72cb VP |
270 | spin_unlock_irq(&ehci->lock); |
271 | msleep(8); | |
272 | spin_lock_irq(&ehci->lock); | |
e198a314 | 273 | |
8c03356a | 274 | /* manually resume the ports we suspended during bus_suspend() */ |
1da177e4 LT |
275 | i = HCS_N_PORTS (ehci->hcs_params); |
276 | while (i--) { | |
083522d7 | 277 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
58a97ffe | 278 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); |
8c03356a | 279 | if (test_bit(i, &ehci->bus_suspended) && |
3a4e72cb | 280 | (temp & PORT_SUSPEND)) { |
1da177e4 | 281 | temp |= PORT_RESUME; |
3a4e72cb VP |
282 | resume_needed = 1; |
283 | } | |
083522d7 | 284 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
1da177e4 | 285 | } |
3a4e72cb VP |
286 | |
287 | /* msleep for 20ms only if code is trying to resume port */ | |
288 | if (resume_needed) { | |
289 | spin_unlock_irq(&ehci->lock); | |
290 | msleep(20); | |
291 | spin_lock_irq(&ehci->lock); | |
292 | } | |
293 | ||
1da177e4 | 294 | i = HCS_N_PORTS (ehci->hcs_params); |
1da177e4 | 295 | while (i--) { |
083522d7 | 296 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
8c03356a AS |
297 | if (test_bit(i, &ehci->bus_suspended) && |
298 | (temp & PORT_SUSPEND)) { | |
299 | temp &= ~(PORT_RWC_BITS | PORT_RESUME); | |
083522d7 | 300 | ehci_writel(ehci, temp, &ehci->regs->port_status [i]); |
8c03356a AS |
301 | ehci_vdbg (ehci, "resumed port %d\n", i + 1); |
302 | } | |
1da177e4 | 303 | } |
083522d7 | 304 | (void) ehci_readl(ehci, &ehci->regs->command); |
1da177e4 LT |
305 | |
306 | /* maybe re-activate the schedule(s) */ | |
307 | temp = 0; | |
308 | if (ehci->async->qh_next.qh) | |
309 | temp |= CMD_ASE; | |
310 | if (ehci->periodic_sched) | |
311 | temp |= CMD_PSE; | |
312 | if (temp) { | |
313 | ehci->command |= temp; | |
083522d7 | 314 | ehci_writel(ehci, ehci->command, &ehci->regs->command); |
1da177e4 LT |
315 | } |
316 | ||
317 | ehci->next_statechange = jiffies + msecs_to_jiffies(5); | |
318 | hcd->state = HC_STATE_RUNNING; | |
319 | ||
320 | /* Now we can safely re-enable irqs */ | |
083522d7 | 321 | ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable); |
1da177e4 LT |
322 | |
323 | spin_unlock_irq (&ehci->lock); | |
3bb1af52 | 324 | ehci_handover_companion_ports(ehci); |
1da177e4 LT |
325 | return 0; |
326 | } | |
327 | ||
328 | #else | |
329 | ||
0c0382e3 AS |
330 | #define ehci_bus_suspend NULL |
331 | #define ehci_bus_resume NULL | |
1da177e4 LT |
332 | |
333 | #endif /* CONFIG_PM */ | |
334 | ||
57e06c11 AS |
335 | /*-------------------------------------------------------------------------*/ |
336 | ||
337 | /* Display the ports dedicated to the companion controller */ | |
5a3201b2 TJ |
338 | static ssize_t show_companion(struct device *dev, |
339 | struct device_attribute *attr, | |
340 | char *buf) | |
57e06c11 AS |
341 | { |
342 | struct ehci_hcd *ehci; | |
343 | int nports, index, n; | |
344 | int count = PAGE_SIZE; | |
345 | char *ptr = buf; | |
346 | ||
5a3201b2 | 347 | ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev))); |
57e06c11 AS |
348 | nports = HCS_N_PORTS(ehci->hcs_params); |
349 | ||
350 | for (index = 0; index < nports; ++index) { | |
351 | if (test_bit(index, &ehci->companion_ports)) { | |
352 | n = scnprintf(ptr, count, "%d\n", index + 1); | |
353 | ptr += n; | |
354 | count -= n; | |
355 | } | |
356 | } | |
357 | return ptr - buf; | |
358 | } | |
359 | ||
360 | /* | |
90da096e | 361 | * Sets the owner of a port |
57e06c11 | 362 | */ |
90da096e | 363 | static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner) |
57e06c11 | 364 | { |
57e06c11 AS |
365 | u32 __iomem *status_reg; |
366 | u32 port_status; | |
90da096e | 367 | int try; |
57e06c11 | 368 | |
90da096e | 369 | status_reg = &ehci->regs->port_status[portnum]; |
57e06c11 AS |
370 | |
371 | /* | |
372 | * The controller won't set the OWNER bit if the port is | |
373 | * enabled, so this loop will sometimes require at least two | |
374 | * iterations: one to disable the port and one to set OWNER. | |
375 | */ | |
57e06c11 AS |
376 | for (try = 4; try > 0; --try) { |
377 | spin_lock_irq(&ehci->lock); | |
378 | port_status = ehci_readl(ehci, status_reg); | |
379 | if ((port_status & PORT_OWNER) == new_owner | |
380 | || (port_status & (PORT_OWNER | PORT_CONNECT)) | |
381 | == 0) | |
382 | try = 0; | |
383 | else { | |
384 | port_status ^= PORT_OWNER; | |
385 | port_status &= ~(PORT_PE | PORT_RWC_BITS); | |
386 | ehci_writel(ehci, port_status, status_reg); | |
387 | } | |
388 | spin_unlock_irq(&ehci->lock); | |
389 | if (try > 1) | |
390 | msleep(5); | |
391 | } | |
90da096e BR |
392 | } |
393 | ||
394 | /* | |
395 | * Dedicate or undedicate a port to the companion controller. | |
396 | * Syntax is "[-]portnum", where a leading '-' sign means | |
397 | * return control of the port to the EHCI controller. | |
398 | */ | |
399 | static ssize_t store_companion(struct device *dev, | |
400 | struct device_attribute *attr, | |
401 | const char *buf, size_t count) | |
402 | { | |
403 | struct ehci_hcd *ehci; | |
404 | int portnum, new_owner; | |
405 | ||
406 | ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev))); | |
407 | new_owner = PORT_OWNER; /* Owned by companion */ | |
408 | if (sscanf(buf, "%d", &portnum) != 1) | |
409 | return -EINVAL; | |
410 | if (portnum < 0) { | |
411 | portnum = - portnum; | |
412 | new_owner = 0; /* Owned by EHCI */ | |
413 | } | |
414 | if (portnum <= 0 || portnum > HCS_N_PORTS(ehci->hcs_params)) | |
415 | return -ENOENT; | |
416 | portnum--; | |
417 | if (new_owner) | |
418 | set_bit(portnum, &ehci->companion_ports); | |
419 | else | |
420 | clear_bit(portnum, &ehci->companion_ports); | |
421 | set_owner(ehci, portnum, new_owner); | |
57e06c11 AS |
422 | return count; |
423 | } | |
5a3201b2 | 424 | static DEVICE_ATTR(companion, 0644, show_companion, store_companion); |
57e06c11 AS |
425 | |
426 | static inline void create_companion_file(struct ehci_hcd *ehci) | |
427 | { | |
428 | int i; | |
429 | ||
430 | /* with integrated TT there is no companion! */ | |
431 | if (!ehci_is_TDI(ehci)) | |
ed14f034 | 432 | i = device_create_file(ehci_to_hcd(ehci)->self.controller, |
5a3201b2 | 433 | &dev_attr_companion); |
57e06c11 AS |
434 | } |
435 | ||
436 | static inline void remove_companion_file(struct ehci_hcd *ehci) | |
437 | { | |
438 | /* with integrated TT there is no companion! */ | |
439 | if (!ehci_is_TDI(ehci)) | |
ed14f034 | 440 | device_remove_file(ehci_to_hcd(ehci)->self.controller, |
5a3201b2 | 441 | &dev_attr_companion); |
57e06c11 AS |
442 | } |
443 | ||
444 | ||
1da177e4 LT |
445 | /*-------------------------------------------------------------------------*/ |
446 | ||
447 | static int check_reset_complete ( | |
448 | struct ehci_hcd *ehci, | |
449 | int index, | |
e6316565 | 450 | u32 __iomem *status_reg, |
1da177e4 LT |
451 | int port_status |
452 | ) { | |
cd4cdc93 | 453 | if (!(port_status & PORT_CONNECT)) |
1da177e4 | 454 | return port_status; |
1da177e4 LT |
455 | |
456 | /* if reset finished and it's still not enabled -- handoff */ | |
457 | if (!(port_status & PORT_PE)) { | |
458 | ||
459 | /* with integrated TT, there's nobody to hand it to! */ | |
460 | if (ehci_is_TDI(ehci)) { | |
461 | ehci_dbg (ehci, | |
462 | "Failed to enable port %d on root hub TT\n", | |
463 | index+1); | |
464 | return port_status; | |
465 | } | |
466 | ||
467 | ehci_dbg (ehci, "port %d full speed --> companion\n", | |
468 | index + 1); | |
469 | ||
470 | // what happens if HCS_N_CC(params) == 0 ? | |
471 | port_status |= PORT_OWNER; | |
10f6524a | 472 | port_status &= ~PORT_RWC_BITS; |
e6316565 | 473 | ehci_writel(ehci, port_status, status_reg); |
1da177e4 | 474 | |
796bcae7 VB |
475 | /* ensure 440EPX ohci controller state is operational */ |
476 | if (ehci->has_amcc_usb23) | |
477 | set_ohci_hcfs(ehci, 1); | |
478 | } else { | |
1da177e4 | 479 | ehci_dbg (ehci, "port %d high speed\n", index + 1); |
796bcae7 VB |
480 | /* ensure 440EPx ohci controller state is suspended */ |
481 | if (ehci->has_amcc_usb23) | |
482 | set_ohci_hcfs(ehci, 0); | |
483 | } | |
1da177e4 LT |
484 | |
485 | return port_status; | |
486 | } | |
487 | ||
488 | /*-------------------------------------------------------------------------*/ | |
489 | ||
490 | ||
491 | /* build "status change" packet (one or two bytes) from HC registers */ | |
492 | ||
493 | static int | |
494 | ehci_hub_status_data (struct usb_hcd *hcd, char *buf) | |
495 | { | |
496 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
497 | u32 temp, status = 0; | |
93f1a47c | 498 | u32 mask; |
1da177e4 LT |
499 | int ports, i, retval = 1; |
500 | unsigned long flags; | |
501 | ||
502 | /* if !USB_SUSPEND, root hub timers won't get shut down ... */ | |
503 | if (!HC_IS_RUNNING(hcd->state)) | |
504 | return 0; | |
505 | ||
506 | /* init status to no-changes */ | |
507 | buf [0] = 0; | |
508 | ports = HCS_N_PORTS (ehci->hcs_params); | |
509 | if (ports > 7) { | |
510 | buf [1] = 0; | |
511 | retval++; | |
512 | } | |
53bd6a60 | 513 | |
93f1a47c DB |
514 | /* Some boards (mostly VIA?) report bogus overcurrent indications, |
515 | * causing massive log spam unless we completely ignore them. It | |
3a4fa0a2 | 516 | * may be relevant that VIA VT8235 controllers, where PORT_POWER is |
93f1a47c DB |
517 | * always set, seem to clear PORT_OCC and PORT_CSC when writing to |
518 | * PORT_POWER; that's surprising, but maybe within-spec. | |
519 | */ | |
520 | if (!ignore_oc) | |
521 | mask = PORT_CSC | PORT_PEC | PORT_OCC; | |
522 | else | |
523 | mask = PORT_CSC | PORT_PEC; | |
524 | // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND | |
525 | ||
1da177e4 LT |
526 | /* no hub change reports (bit 0) for now (power, ...) */ |
527 | ||
528 | /* port N changes (bit N)? */ | |
529 | spin_lock_irqsave (&ehci->lock, flags); | |
530 | for (i = 0; i < ports; i++) { | |
083522d7 | 531 | temp = ehci_readl(ehci, &ehci->regs->port_status [i]); |
625b5c9a AS |
532 | |
533 | /* | |
534 | * Return status information even for ports with OWNER set. | |
535 | * Otherwise khubd wouldn't see the disconnect event when a | |
536 | * high-speed device is switched over to the companion | |
537 | * controller by the user. | |
538 | */ | |
539 | ||
eafe5b99 AS |
540 | if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend) |
541 | || (ehci->reset_done[i] && time_after_eq( | |
542 | jiffies, ehci->reset_done[i]))) { | |
1da177e4 LT |
543 | if (i < 7) |
544 | buf [0] |= 1 << (i + 1); | |
545 | else | |
546 | buf [1] |= 1 << (i - 7); | |
547 | status = STS_PCD; | |
548 | } | |
549 | } | |
550 | /* FIXME autosuspend idle root hubs */ | |
551 | spin_unlock_irqrestore (&ehci->lock, flags); | |
552 | return status ? retval : 0; | |
553 | } | |
554 | ||
555 | /*-------------------------------------------------------------------------*/ | |
556 | ||
557 | static void | |
558 | ehci_hub_descriptor ( | |
559 | struct ehci_hcd *ehci, | |
560 | struct usb_hub_descriptor *desc | |
561 | ) { | |
562 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
563 | u16 temp; | |
564 | ||
565 | desc->bDescriptorType = 0x29; | |
566 | desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */ | |
567 | desc->bHubContrCurrent = 0; | |
568 | ||
569 | desc->bNbrPorts = ports; | |
570 | temp = 1 + (ports / 8); | |
571 | desc->bDescLength = 7 + 2 * temp; | |
572 | ||
573 | /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ | |
574 | memset (&desc->bitmap [0], 0, temp); | |
575 | memset (&desc->bitmap [temp], 0xff, temp); | |
576 | ||
577 | temp = 0x0008; /* per-port overcurrent reporting */ | |
578 | if (HCS_PPC (ehci->hcs_params)) | |
579 | temp |= 0x0001; /* per-port power control */ | |
56c1e26d DB |
580 | else |
581 | temp |= 0x0002; /* no power switching */ | |
1da177e4 LT |
582 | #if 0 |
583 | // re-enable when we support USB_PORT_FEAT_INDICATOR below. | |
584 | if (HCS_INDICATOR (ehci->hcs_params)) | |
585 | temp |= 0x0080; /* per-port indicators (LEDs) */ | |
586 | #endif | |
fd05e720 | 587 | desc->wHubCharacteristics = cpu_to_le16(temp); |
1da177e4 LT |
588 | } |
589 | ||
590 | /*-------------------------------------------------------------------------*/ | |
591 | ||
1da177e4 LT |
592 | static int ehci_hub_control ( |
593 | struct usb_hcd *hcd, | |
594 | u16 typeReq, | |
595 | u16 wValue, | |
596 | u16 wIndex, | |
597 | char *buf, | |
598 | u16 wLength | |
599 | ) { | |
600 | struct ehci_hcd *ehci = hcd_to_ehci (hcd); | |
601 | int ports = HCS_N_PORTS (ehci->hcs_params); | |
383975d7 AS |
602 | u32 __iomem *status_reg = &ehci->regs->port_status[ |
603 | (wIndex & 0xff) - 1]; | |
331ac6b2 AD |
604 | u32 __iomem *hostpc_reg = NULL; |
605 | u32 temp, temp1, status; | |
1da177e4 LT |
606 | unsigned long flags; |
607 | int retval = 0; | |
f0d7f273 | 608 | unsigned selector; |
1da177e4 LT |
609 | |
610 | /* | |
611 | * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. | |
612 | * HCS_INDICATOR may say we can change LEDs to off/amber/green. | |
613 | * (track current state ourselves) ... blink for diagnostics, | |
614 | * power, "this is the one", etc. EHCI spec supports this. | |
615 | */ | |
616 | ||
331ac6b2 AD |
617 | if (ehci->has_hostpc) |
618 | hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs | |
619 | + HOSTPC0 + 4 * ((wIndex & 0xff) - 1)); | |
1da177e4 LT |
620 | spin_lock_irqsave (&ehci->lock, flags); |
621 | switch (typeReq) { | |
622 | case ClearHubFeature: | |
623 | switch (wValue) { | |
624 | case C_HUB_LOCAL_POWER: | |
625 | case C_HUB_OVER_CURRENT: | |
626 | /* no hub-wide feature/status flags */ | |
627 | break; | |
628 | default: | |
629 | goto error; | |
630 | } | |
631 | break; | |
632 | case ClearPortFeature: | |
633 | if (!wIndex || wIndex > ports) | |
634 | goto error; | |
635 | wIndex--; | |
e6316565 | 636 | temp = ehci_readl(ehci, status_reg); |
625b5c9a AS |
637 | |
638 | /* | |
639 | * Even if OWNER is set, so the port is owned by the | |
640 | * companion controller, khubd needs to be able to clear | |
641 | * the port-change status bits (especially | |
642 | * USB_PORT_FEAT_C_CONNECTION). | |
643 | */ | |
1da177e4 LT |
644 | |
645 | switch (wValue) { | |
646 | case USB_PORT_FEAT_ENABLE: | |
e6316565 | 647 | ehci_writel(ehci, temp & ~PORT_PE, status_reg); |
1da177e4 LT |
648 | break; |
649 | case USB_PORT_FEAT_C_ENABLE: | |
083522d7 | 650 | ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_PEC, |
e6316565 | 651 | status_reg); |
1da177e4 LT |
652 | break; |
653 | case USB_PORT_FEAT_SUSPEND: | |
654 | if (temp & PORT_RESET) | |
655 | goto error; | |
f8aeb3bb DB |
656 | if (ehci->no_selective_suspend) |
657 | break; | |
1da177e4 LT |
658 | if (temp & PORT_SUSPEND) { |
659 | if ((temp & PORT_PE) == 0) | |
660 | goto error; | |
661 | /* resume signaling for 20 msec */ | |
10f6524a | 662 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); |
083522d7 | 663 | ehci_writel(ehci, temp | PORT_RESUME, |
e6316565 | 664 | status_reg); |
1da177e4 LT |
665 | ehci->reset_done [wIndex] = jiffies |
666 | + msecs_to_jiffies (20); | |
667 | } | |
668 | break; | |
669 | case USB_PORT_FEAT_C_SUSPEND: | |
d1f114d1 | 670 | clear_bit(wIndex, &ehci->port_c_suspend); |
1da177e4 LT |
671 | break; |
672 | case USB_PORT_FEAT_POWER: | |
673 | if (HCS_PPC (ehci->hcs_params)) | |
083522d7 BH |
674 | ehci_writel(ehci, |
675 | temp & ~(PORT_RWC_BITS | PORT_POWER), | |
e6316565 | 676 | status_reg); |
1da177e4 LT |
677 | break; |
678 | case USB_PORT_FEAT_C_CONNECTION: | |
083522d7 | 679 | ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC, |
e6316565 | 680 | status_reg); |
1da177e4 LT |
681 | break; |
682 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
083522d7 | 683 | ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_OCC, |
e6316565 | 684 | status_reg); |
1da177e4 LT |
685 | break; |
686 | case USB_PORT_FEAT_C_RESET: | |
687 | /* GetPortStatus clears reset */ | |
688 | break; | |
689 | default: | |
690 | goto error; | |
691 | } | |
083522d7 | 692 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */ |
1da177e4 LT |
693 | break; |
694 | case GetHubDescriptor: | |
695 | ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *) | |
696 | buf); | |
697 | break; | |
698 | case GetHubStatus: | |
699 | /* no hub-wide feature/status flags */ | |
700 | memset (buf, 0, 4); | |
701 | //cpu_to_le32s ((u32 *) buf); | |
702 | break; | |
703 | case GetPortStatus: | |
704 | if (!wIndex || wIndex > ports) | |
705 | goto error; | |
706 | wIndex--; | |
707 | status = 0; | |
e6316565 | 708 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
709 | |
710 | // wPortChange bits | |
711 | if (temp & PORT_CSC) | |
712 | status |= 1 << USB_PORT_FEAT_C_CONNECTION; | |
713 | if (temp & PORT_PEC) | |
714 | status |= 1 << USB_PORT_FEAT_C_ENABLE; | |
756aa6b3 CE |
715 | |
716 | if ((temp & PORT_OCC) && !ignore_oc){ | |
1da177e4 LT |
717 | status |= 1 << USB_PORT_FEAT_C_OVER_CURRENT; |
718 | ||
756aa6b3 CE |
719 | /* |
720 | * Hubs should disable port power on over-current. | |
721 | * However, not all EHCI implementations do this | |
722 | * automatically, even if they _do_ support per-port | |
723 | * power switching; they're allowed to just limit the | |
724 | * current. khubd will turn the power back on. | |
725 | */ | |
726 | if (HCS_PPC (ehci->hcs_params)){ | |
727 | ehci_writel(ehci, | |
728 | temp & ~(PORT_RWC_BITS | PORT_POWER), | |
729 | status_reg); | |
730 | } | |
731 | } | |
732 | ||
1da177e4 | 733 | /* whoever resumes must GetPortStatus to complete it!! */ |
629e4427 AS |
734 | if (temp & PORT_RESUME) { |
735 | ||
736 | /* Remote Wakeup received? */ | |
737 | if (!ehci->reset_done[wIndex]) { | |
738 | /* resume signaling for 20 msec */ | |
739 | ehci->reset_done[wIndex] = jiffies | |
740 | + msecs_to_jiffies(20); | |
741 | /* check the port again */ | |
742 | mod_timer(&ehci_to_hcd(ehci)->rh_timer, | |
743 | ehci->reset_done[wIndex]); | |
744 | } | |
1da177e4 | 745 | |
629e4427 AS |
746 | /* resume completed? */ |
747 | else if (time_after_eq(jiffies, | |
748 | ehci->reset_done[wIndex])) { | |
eafe5b99 | 749 | clear_bit(wIndex, &ehci->suspended_ports); |
d1f114d1 | 750 | set_bit(wIndex, &ehci->port_c_suspend); |
629e4427 AS |
751 | ehci->reset_done[wIndex] = 0; |
752 | ||
753 | /* stop resume signaling */ | |
754 | temp = ehci_readl(ehci, status_reg); | |
755 | ehci_writel(ehci, | |
e6316565 AS |
756 | temp & ~(PORT_RWC_BITS | PORT_RESUME), |
757 | status_reg); | |
629e4427 | 758 | retval = handshake(ehci, status_reg, |
083522d7 | 759 | PORT_RESUME, 0, 2000 /* 2msec */); |
629e4427 AS |
760 | if (retval != 0) { |
761 | ehci_err(ehci, | |
762 | "port %d resume error %d\n", | |
763 | wIndex + 1, retval); | |
764 | goto error; | |
765 | } | |
766 | temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10)); | |
1da177e4 | 767 | } |
1da177e4 LT |
768 | } |
769 | ||
770 | /* whoever resets must GetPortStatus to complete it!! */ | |
771 | if ((temp & PORT_RESET) | |
629e4427 AS |
772 | && time_after_eq(jiffies, |
773 | ehci->reset_done[wIndex])) { | |
1da177e4 LT |
774 | status |= 1 << USB_PORT_FEAT_C_RESET; |
775 | ehci->reset_done [wIndex] = 0; | |
776 | ||
777 | /* force reset to complete */ | |
083522d7 | 778 | ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET), |
e6316565 | 779 | status_reg); |
c22fa3ac DB |
780 | /* REVISIT: some hardware needs 550+ usec to clear |
781 | * this bit; seems too long to spin routinely... | |
782 | */ | |
e6316565 | 783 | retval = handshake(ehci, status_reg, |
c22fa3ac | 784 | PORT_RESET, 0, 750); |
1da177e4 LT |
785 | if (retval != 0) { |
786 | ehci_err (ehci, "port %d reset error %d\n", | |
787 | wIndex + 1, retval); | |
788 | goto error; | |
789 | } | |
790 | ||
791 | /* see what we found out */ | |
e6316565 AS |
792 | temp = check_reset_complete (ehci, wIndex, status_reg, |
793 | ehci_readl(ehci, status_reg)); | |
1da177e4 LT |
794 | } |
795 | ||
eafe5b99 AS |
796 | if (!(temp & (PORT_RESUME|PORT_RESET))) |
797 | ehci->reset_done[wIndex] = 0; | |
798 | ||
57e06c11 AS |
799 | /* transfer dedicated ports to the companion hc */ |
800 | if ((temp & PORT_CONNECT) && | |
801 | test_bit(wIndex, &ehci->companion_ports)) { | |
802 | temp &= ~PORT_RWC_BITS; | |
803 | temp |= PORT_OWNER; | |
804 | ehci_writel(ehci, temp, status_reg); | |
805 | ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1); | |
806 | temp = ehci_readl(ehci, status_reg); | |
807 | } | |
808 | ||
625b5c9a AS |
809 | /* |
810 | * Even if OWNER is set, there's no harm letting khubd | |
811 | * see the wPortStatus values (they should all be 0 except | |
812 | * for PORT_POWER anyway). | |
813 | */ | |
814 | ||
815 | if (temp & PORT_CONNECT) { | |
816 | status |= 1 << USB_PORT_FEAT_CONNECTION; | |
817 | // status may be from integrated TT | |
331ac6b2 AD |
818 | if (ehci->has_hostpc) { |
819 | temp1 = ehci_readl(ehci, hostpc_reg); | |
820 | status |= ehci_port_speed(ehci, temp1); | |
821 | } else | |
822 | status |= ehci_port_speed(ehci, temp); | |
1da177e4 | 823 | } |
625b5c9a AS |
824 | if (temp & PORT_PE) |
825 | status |= 1 << USB_PORT_FEAT_ENABLE; | |
eafe5b99 AS |
826 | |
827 | /* maybe the port was unsuspended without our knowledge */ | |
828 | if (temp & (PORT_SUSPEND|PORT_RESUME)) { | |
625b5c9a | 829 | status |= 1 << USB_PORT_FEAT_SUSPEND; |
eafe5b99 AS |
830 | } else if (test_bit(wIndex, &ehci->suspended_ports)) { |
831 | clear_bit(wIndex, &ehci->suspended_ports); | |
832 | ehci->reset_done[wIndex] = 0; | |
833 | if (temp & PORT_PE) | |
834 | set_bit(wIndex, &ehci->port_c_suspend); | |
835 | } | |
836 | ||
625b5c9a AS |
837 | if (temp & PORT_OC) |
838 | status |= 1 << USB_PORT_FEAT_OVER_CURRENT; | |
839 | if (temp & PORT_RESET) | |
840 | status |= 1 << USB_PORT_FEAT_RESET; | |
841 | if (temp & PORT_POWER) | |
842 | status |= 1 << USB_PORT_FEAT_POWER; | |
d1f114d1 AS |
843 | if (test_bit(wIndex, &ehci->port_c_suspend)) |
844 | status |= 1 << USB_PORT_FEAT_C_SUSPEND; | |
1da177e4 | 845 | |
9776afc8 | 846 | #ifndef VERBOSE_DEBUG |
1da177e4 LT |
847 | if (status & ~0xffff) /* only if wPortChange is interesting */ |
848 | #endif | |
849 | dbg_port (ehci, "GetStatus", wIndex + 1, temp); | |
a5abdeaf | 850 | put_unaligned_le32(status, buf); |
1da177e4 LT |
851 | break; |
852 | case SetHubFeature: | |
853 | switch (wValue) { | |
854 | case C_HUB_LOCAL_POWER: | |
855 | case C_HUB_OVER_CURRENT: | |
856 | /* no hub-wide feature/status flags */ | |
857 | break; | |
858 | default: | |
859 | goto error; | |
860 | } | |
861 | break; | |
862 | case SetPortFeature: | |
f0d7f273 DB |
863 | selector = wIndex >> 8; |
864 | wIndex &= 0xff; | |
8d053c79 JW |
865 | if (unlikely(ehci->debug)) { |
866 | /* If the debug port is active any port | |
867 | * feature requests should get denied */ | |
868 | if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) && | |
869 | (readl(&ehci->debug->control) & DBGP_ENABLED)) { | |
870 | retval = -ENODEV; | |
871 | goto error_exit; | |
872 | } | |
873 | } | |
1da177e4 LT |
874 | if (!wIndex || wIndex > ports) |
875 | goto error; | |
876 | wIndex--; | |
e6316565 | 877 | temp = ehci_readl(ehci, status_reg); |
1da177e4 LT |
878 | if (temp & PORT_OWNER) |
879 | break; | |
880 | ||
10f6524a | 881 | temp &= ~PORT_RWC_BITS; |
1da177e4 LT |
882 | switch (wValue) { |
883 | case USB_PORT_FEAT_SUSPEND: | |
f8aeb3bb DB |
884 | if (ehci->no_selective_suspend) |
885 | break; | |
1da177e4 LT |
886 | if ((temp & PORT_PE) == 0 |
887 | || (temp & PORT_RESET) != 0) | |
888 | goto error; | |
e6316565 | 889 | ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); |
331ac6b2 AD |
890 | /* After above check the port must be connected. |
891 | * Set appropriate bit thus could put phy into low power | |
892 | * mode if we have hostpc feature | |
893 | */ | |
894 | if (hostpc_reg) { | |
895 | temp &= ~PORT_WKCONN_E; | |
896 | temp |= (PORT_WKDISC_E | PORT_WKOC_E); | |
897 | ehci_writel(ehci, temp | PORT_SUSPEND, | |
898 | status_reg); | |
899 | msleep(5);/* 5ms for HCD enter low pwr mode */ | |
900 | temp1 = ehci_readl(ehci, hostpc_reg); | |
901 | ehci_writel(ehci, temp1 | HOSTPC_PHCD, | |
902 | hostpc_reg); | |
903 | temp1 = ehci_readl(ehci, hostpc_reg); | |
904 | ehci_dbg(ehci, "Port%d phy low pwr mode %s\n", | |
905 | wIndex, (temp1 & HOSTPC_PHCD) ? | |
906 | "succeeded" : "failed"); | |
907 | } | |
eafe5b99 | 908 | set_bit(wIndex, &ehci->suspended_ports); |
1da177e4 LT |
909 | break; |
910 | case USB_PORT_FEAT_POWER: | |
911 | if (HCS_PPC (ehci->hcs_params)) | |
083522d7 | 912 | ehci_writel(ehci, temp | PORT_POWER, |
e6316565 | 913 | status_reg); |
1da177e4 LT |
914 | break; |
915 | case USB_PORT_FEAT_RESET: | |
916 | if (temp & PORT_RESUME) | |
917 | goto error; | |
918 | /* line status bits may report this as low speed, | |
919 | * which can be fine if this root hub has a | |
920 | * transaction translator built in. | |
921 | */ | |
922 | if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT | |
923 | && !ehci_is_TDI(ehci) | |
924 | && PORT_USB11 (temp)) { | |
925 | ehci_dbg (ehci, | |
926 | "port %d low speed --> companion\n", | |
927 | wIndex + 1); | |
928 | temp |= PORT_OWNER; | |
929 | } else { | |
930 | ehci_vdbg (ehci, "port %d reset\n", wIndex + 1); | |
931 | temp |= PORT_RESET; | |
932 | temp &= ~PORT_PE; | |
933 | ||
934 | /* | |
935 | * caller must wait, then call GetPortStatus | |
936 | * usb 2.0 spec says 50 ms resets on root | |
937 | */ | |
938 | ehci->reset_done [wIndex] = jiffies | |
939 | + msecs_to_jiffies (50); | |
940 | } | |
e6316565 | 941 | ehci_writel(ehci, temp, status_reg); |
1da177e4 | 942 | break; |
f0d7f273 DB |
943 | |
944 | /* For downstream facing ports (these): one hub port is put | |
945 | * into test mode according to USB2 11.24.2.13, then the hub | |
946 | * must be reset (which for root hub now means rmmod+modprobe, | |
947 | * or else system reboot). See EHCI 2.3.9 and 4.14 for info | |
948 | * about the EHCI-specific stuff. | |
949 | */ | |
950 | case USB_PORT_FEAT_TEST: | |
951 | if (!selector || selector > 5) | |
952 | goto error; | |
953 | ehci_quiesce(ehci); | |
954 | ehci_halt(ehci); | |
955 | temp |= selector << 16; | |
e6316565 | 956 | ehci_writel(ehci, temp, status_reg); |
f0d7f273 DB |
957 | break; |
958 | ||
1da177e4 LT |
959 | default: |
960 | goto error; | |
961 | } | |
083522d7 | 962 | ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ |
1da177e4 LT |
963 | break; |
964 | ||
965 | default: | |
966 | error: | |
967 | /* "stall" on error */ | |
968 | retval = -EPIPE; | |
969 | } | |
8d053c79 | 970 | error_exit: |
1da177e4 LT |
971 | spin_unlock_irqrestore (&ehci->lock, flags); |
972 | return retval; | |
973 | } | |
90da096e BR |
974 | |
975 | static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum) | |
976 | { | |
977 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
978 | ||
979 | if (ehci_is_TDI(ehci)) | |
980 | return; | |
981 | set_owner(ehci, --portnum, PORT_OWNER); | |
982 | } | |
983 | ||
3a31155c AS |
984 | static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum) |
985 | { | |
986 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
987 | u32 __iomem *reg; | |
988 | ||
989 | if (ehci_is_TDI(ehci)) | |
990 | return 0; | |
991 | reg = &ehci->regs->port_status[portnum - 1]; | |
992 | return ehci_readl(ehci, reg) & PORT_OWNER; | |
993 | } |